will a fox keep up with the ASP
In what little experience I have, a good Fox (i.e., one that runs well and restarts hot) will keep up quite well with the ASP/Magnum engines. The venturi size and other constraints levied on the ASP/Magnum models makes them essentially equal. (That was done on purpose.)
That being said, it is a lot easier to make the ASP/Magnum run and restart hot, and VERY difficult to get a Fox to do the same.
The idea is that if the ASP/Magnum engines prove to be too fast for the Fox to be competitive,, just like TQR, the venturi size can be adjusted.
Bill